SN74AHCT32MDREP Equivalent & Substitute Parts

Part Overview

The SN74AHCT32MDREP is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when specific operational requirements necessitate alternative manufacturers or performance characteristics.

Substiute Parts

SN74AHCT32MDREP

Texas InstrumentsIn Stock: 1055SN74AHCT32MDREP Datasheet

Current PartRFQ

74AHCT32D-Q100J

Nexperia USA Inc.In Stock: 124974AHCT32D-Q100J Datasheet

MFR RecommendedRFQ

74AHCT32S14-13

Diodes IncorporatedIn Stock: 83774AHCT32S14-13 Datasheet

MFR RecommendedRFQ

MC74VHCT32ADR2G

onsemiIn Stock: 2089MC74VHCT32ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AHCT32MDREP are qualified based on the following criteria:

Core Functional Parameters (Must Match):

• Logic Type: OR Gate
• Number of Circuits: 4
• Number of Inputs: 2
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Electrical Parameters (Must Be Compatible):

• Voltage - Supply: 4.5V ~ 5.5V minimum requirement
• Current - Output High, Low: 8mA, 8mA
• Input Logic Level thresholds within acceptable range
• Max Propagation Delay: 7.9ns or better @ 5V, 50pF

Acceptable Variations:

• Operating Temperature range may extend beyond -55°C ~ 125°C
• Current - Quiescent may vary within specified limits
• Manufacturer and series designation may differ (74AHCT vs 74VHCT)
• Automotive qualification (AEC-Q100) is an enhancement, not a requirement

Parameter Comparison

Engineering Selection Recommendations

74AHCT32D-Q100J (Nexperia USA Inc.): This substitute is qualified for direct replacement in standard applications. The part maintains identical electrical specifications to the primary part with the addition of AEC-Q100 automotive qualification. Operating temperature range is -40°C ~ 125°C, which is acceptable for most industrial and commercial applications. Select this part when automotive-grade reliability is required or when Nexperia supply chain availability is preferred.

74AHCT32S14-13 (Diodes Incorporated): This substitute maintains functional and electrical compatibility with the primary part. Quiescent current is specified at 20 µA maximum, which is higher than the primary part's 2 µA specification. Operating temperature range is -40°C ~ 125°C. Select this part when Diodes Incorporated supply chain availability is prioritized and the higher quiescent current specification is acceptable for the application.

MC74VHCT32ADR2G (onsemi): This substitute operates across an extended supply voltage range of 2V ~ 5.5V, providing greater flexibility for low-voltage applications compared to the primary part's 4.5V ~ 5.5V specification. Input logic level thresholds are specified as ranges (0.53V ~ 0.8V for low, 1.2V ~ 2V for high) rather than fixed values. Propagation delay is 7.5ns, which is superior to the primary part's 7.9ns specification. Operating temperature range matches the primary part at -55°C ~ 125°C. Select this part when low-voltage operation or improved propagation delay performance is required.

Frequently Asked Questions (FAQ)

Q: Can I use 74AHCT32D-Q100J as a direct replacement for SN74AHCT32MDREP?

A: Yes. The 74AHCT32D-Q100J maintains identical electrical specifications and package configuration. The primary difference is the addition of AEC-Q100 automotive qualification and a narrower operating temperature range (-40°C ~ 125°C vs -55°C ~ 125°C). Verify that your application does not require operation below -40°C.

Q: What is the significance of the higher quiescent current in 74AHCT32S14-13?

A: The 74AHCT32S14-13 specifies a maximum quiescent current of 20 µA compared to 2 µA for the primary part. This parameter represents the current consumed by the device when no outputs are switching. In battery-powered or low-power applications where quiescent current is critical, the primary part or alternative substitutes with lower quiescent current specifications should be preferred.

Q: Is MC74VHCT32ADR2G compatible with 5V systems?

A: Yes. The MC74VHCT32ADR2G operates across 2V ~ 5.5V supply voltage range, which includes standard 5V systems. The extended low-voltage capability (down to 2V) provides additional flexibility. All electrical parameters remain compatible with 5V operation.

Q: What are the package differences between these parts?

A: All substitute parts use the 14-SOIC (0.154", 3.90mm Width) package, which is physically and electrically identical to the primary part. No PCB layout modifications are required for substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the primary part's environmental compliance status.

Q: Which substitute should I select for low-temperature applications?

A: The SN74AHCT32MDREP (primary part) and MC74VHCT32ADR2G both operate to -55°C. The 74AHCT32D-Q100J and 74AHCT32S14-13 are rated only to -40°C. For applications requiring operation below -40°C, select the primary part or the onsemi MC74VHCT32ADR2G substitute.